玉米N素营养快速诊断精准施肥技术研究  

Studes on precision fertilization technology for maize nitrogen nutrition rapid diagnose

作　　者：米艳华[1] 李茂萱 潘艳华[2] 邹炳礼[2] 沙凌杰[1] 张晓林[1] 

机构地区：[1]云南省农业科学院质量标准与检测技术所,云南昆明650223 [2]云南省农业科学院农业环境与资源所,云南昆明650224

出　　处：《西南农业学报》2008年第2期402-407,共6页Southwest China Journal of Agricultural Sciences

基　　金：云南省科技攻关计划项目(2002NG13)

摘　　要：在田间试验中,用反射仪—硝酸根试纸法田间现场速测作物汁液硝酸根含量水平,研究作物最佳测试部位,土壤硝酸根含量、施氮量、食部硝酸盐含量和产量的关系,用于氮素营养诊断推荐追肥,减少氮肥用量,可以最大限度地控制过量化肥对作物和环境的污染。在云南省保山市隆阳区道街乡等高村亚热带干热河谷缓坡耕地设置了玉米精准施肥试验。通过对玉米不同施氮量的田间试验和硝酸盐含量的测试,研究了玉米某一时期特定部位的硝酸根含量与土壤硝酸根含量、施氮量、作物食部硝酸根含量和产量的关系,确定了玉米施肥诊断时期、诊断部位、采样时间、诊断临界值及其对应的追肥量。为当地高产玉米种植,减少化肥对土地资源的破坏提供了科学依据。In the field experiments of nitrogen application rate for nitrate level of crop,tested by nitrate test-strip-reflectometer in the field, the relationship among the nitrate content in the soil ,yield and nitrogenous application rates were statistically analyses. Usedrapid testing nitrate level in crops precision fertilization, the applied nitrate recommended were low than conventional high-yield, and the nitrate content of crop and nitrogenous fertilizers pollution for the environment were controlled remarkably. It is set up test that maize precision fertilization in Daojie countryside of Yunnan Baeshan. Determining the best diagnose time, position, critical value and corresponding top application for the maize precision fertilization.

关 键 词：玉米 N素营养 快速诊断 精准施肥 

分 类 号：S513.048[农业科学—作物学]